| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] could [adv] [vb infin] | 19916 |
|
| 2 | [Wh adv] [pers pn] could [vb infin] | 714 |
|
| 3 | [Wh adv] [pers pn] could [adv] | 305 |
|
| 4 | [Wh adv] could [adv] [vb infin] | 5 |
|
